It's in the new X5M and X6M. From the press release:
Both models are powered by a newly-developed 4.4-liter V8 M engine delivering 555 hp at 6,000 rpm and 500 lb-ft of torque from 1500 to 5,650 rpm. This new M engine is the world’s first with a pulse-tuned exhaust manifold encompassing both rows of cylinders combined with high-performance twin-scroll twin turbo technology.
The first modern turbocharged M engine: twin scroll twin turbo technology with a patented exhaust manifold.
Using BMW’s innovative, 4.4L reverse-flow V8 engine with High Precision Direct Injection and twin turbochargers as a basis, the new M engine introduces twinscroll twin turbochargers and patented exhaust manifold technologies to achieve outstanding thrust and pulling force, while preserving the most compact
dimensions possible. Two low-mass twin-scroll turbochargers are positioned together with the catalytic converters in the “V” section between the two banks
of cylinders. By reversing the flow of gases through the engine from traditional arrangements, the intake and exhaust ducts are shortened and widened. The result is that pressure losses on the exhaust side are minimized.
The goals: virtually eliminate turbocharger lag while maximizing combustion efficiency and power output.
Tremendous power and performance are delivered by the engine in the BMW X5 M and BMW X6 M through a new design and construction principle. The new M V8 engine with twin-scroll twin turbo technology uses a single exhaust manifold with tuned-length runners, incorporating both cylinder banks and connecting cylinders in carefully-selected pairs. This configuration, patented by BMW M and known as Cylinder-bank Comprehensive Manifold (CCM), offers lightning-quick response, a linear build-up of engine power, and a broad, consistent torque curve by feeding each of the twin turbochargers with a “charge pulse” at approximately every 90 degrees of crankshaft rotation, rather than the more traditional “irregular schedule” of
charging.
The managed flow of exhaust gas provided by the CCM ensures high-velocity flow of combustion gases. The appropriate separation of exhaust gas flow from different cylinders is maintained until the gas reaches the turbine wheel, spooling the two twin-scroll turbochargers without back-pressure. With maximum boost pressure of 1.5 bar (21 psi), the use of twin-scroll twin turbo technology and the CCM exhaust manifold allows complete exploitation of the benefits of turbocharging.
Immediate response and remarkable thrust characterize the new V8 twinturbocharged engine from BMW M GmbH. The impressive onset of power is accompanied by unique, engaging engine sounds that accentuate the quickrevving characteristics with the dynamic acoustic effect typical of a BMW M product. The sounds are always civilized, but transform from relatively calm to extraordinarily intense as the boost and revs build from idle. Reflecting the tremendous power of the engine, the turbocharged M V8 is equipped with an advanced cooling system developed specifically for the two new models. One notable feature in this context is the presence of two high-capacity water-to-air intercoolers which consistently optimize performance under the most demanding driving conditions. An aluminum oil sump exclusive to BMW M with a special finned surface guarantees optimum cooling at all times even under an extremely demanding style of driving.
The turbocharged M V8 engine develops its outstanding power with remarkable efficiency. In addition to BMW’s High Precision Direct Injection, both the BMW X5 M and the BMW X6 M are equipped with a range of technologies from BMW’s EfficientDynamics engineering strategy. These include on-demand control of the electric fuel pump, an on-demand compressor for the air conditioner, and a flowcontrolled supply of hydraulic fluid to the Active Roll Stabilization system. By operating these features specifically on demand, energy waste is minimized. The engine fulfills the requirements of the US LEV II standard as well as the EU5 requirements in Europe.
The Following 2 Users Say Thank You to Five50nowM5 For This Useful Post:
Unless something drastic happens, this is going to be the next M5 engine.
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Ashok
2002 E39 Carbonblack/Caramel M5 (best car I ever owned)
2005 E60 Blue Onyx/Caramel/Light Figured Ash M5 (worst car I ever owned)
2007 E90 Montego Blue/Black Alpina D3 (sublime) Let me tell you what SMG stands for...
With that torque curve, I calculate a 0 - 60 of 3.4 sec and 1/4 mile in 11.1 sec at 124 mph. Assuming one can get it to hook up. That's alot of grunt to pass by without giving it a whirl before condemning turbo.
I think i'd still take the E60. I remember very clearly in my E60/61 M5/6 brochure the lines.. "BMW M engineers. Masters of increasing muscle without the use of steroids."
I know they were referring to forced-induction motors; i'm staying true to their saying.
I think i'd still take the E60. I remember very clearly in my E60/61 M5/6 brochure the lines.. "BMW M engineers. Masters of increasing muscle without the use of steroids."
I know they were referring to forced-induction motors; i'm staying true to their saying.
nope, they were referring to nitrous. I know it.
a turbo just gives you more of what you already have: air
and uses free / otherwise wasted energy to get it: exhaust gas
Last edited by varmint007; 14th September 2009 at 23:34.
I would bet it is going to be a 5.5 litre V-10. With the rumors recently floating around with that number it makes sense. The new X5M motor is 4.4 litres. Now, divide 4.4 by 8 and you get .55 litre per cylinder. Now multiple that times 10 for the V-10 and you get the 5.5 litre number. If any of you remember a while back, BMW said the perfect size cylinder for combustion was .5 litres. Now if anyone is paying attention, all the current BMW motors are very close, if not exact, to the .5 litre per cylinder (even thought the numbering system of models doesn't reflect it anymore, ie 328 has a 3.0 litre inline 6). Even the new M's dont very much, just enough to give a little bit more torgue.
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